Added semitones are sharp 4th (which
predates the chime, and was made by
Meneely/Watervliet) and flat 7th.

*Technical data:

Traditional chime (chimestand) of 10 bells
Pitch of heaviest bell is F in the middle octave
Transposition is nil (concert pitch)
Keyboard range: F F / NONE
There are two added semitones
The whole instrument was installed in 1902
with bells made by Meneely/Troy (except for 1)
Year of latest technical information source is 1997

*Links:

The church Website has a Music Ministry page
which includes a section about the chime and a photo of the chimer at work.
The About Us page has a photo of the building, which shows part of the bell tower.